1  /* HPPA internal mutex struct definitions.
       2     Copyright (C) 2019-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <http://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _THREAD_MUTEX_INTERNAL_H
      20  #define _THREAD_MUTEX_INTERNAL_H 1
      21  
      22  struct __pthread_mutex_s
      23  {
      24    int __lock __LOCK_ALIGNMENT;
      25    unsigned int __count;
      26    int __owner;
      27    /* KIND must stay at this position in the structure to maintain
      28       binary compatibility with static initializers.  */
      29    int __kind;
      30    /* The old 4-word 16-byte aligned lock. This is initialized
      31       to all ones by the Linuxthreads PTHREAD_MUTEX_INITIALIZER.
      32       Unused in NPTL.  */
      33    int __glibc_compat_padding[4];
      34    /* In the old structure there are 4 words left due to alignment.
      35       In NPTL two words are used.  */
      36    unsigned int __nusers;
      37    __extension__ union
      38    {
      39      int __spins;
      40      __pthread_slist_t __list;
      41    };
      42    /* Two more words are left before the NPTL
      43       pthread_mutex_t is larger than Linuxthreads.  */
      44    int __glibc_reserved1;
      45    int __glibc_reserved2;
      46  };
      47  
      48  #define __PTHREAD_MUTEX_HAVE_PREV       0
      49  
      50  #define __PTHREAD_MUTEX_INITIALIZER(__kind) \
      51    0, 0, 0, __kind, { 0, 0, 0, 0 }, 0, { 0 }, 0, 0
      52  
      53  #endif